Flight recorder data recovered from the wreckage of Boeing 737 MAX planes that crashed in Ethiopia and Indonesia shows "clear similarities," Addis Ababa said Sunday as the US maker announced it was finalizing a software update for its under-fire anti-stall system.

Ethiopians were holding funerals Sunday for friends and relatives who perished in last week's Ethiopian Airlines crash, which killed all onboard and saw the worldwide grounding of the Boeing aircraft involved.

The Ethiopian Airlines pilot whose jet crashed killing 157 people had reported flight-control problems, the company said on Wednesday, as it prepared to send the black boxes to Europe from a disaster that has rocked the global aviation industry.

The Boeing Co 737 MAX jet crashed into the Java Sea on Oct. 29 shortly after take-off from Jakarta, but the families expressed concern that the remains of 64 passengers have yet to be identified, with just 30 percent of the plane’s body found.